Significant Figures and Rounding Quiz

What is the first step in expressing a number to three significant figures?

• Ignore all zeros in the number.

• Count all the digits in the number.

• Round the number to the nearest whole number.

• Identify the first non-zero digit from the left.

Which digit is considered the first significant figure in the number 0.0040752?

• 7

• 0

• 5

• 4

How many significant figures are required in the number 0.0040752?

• Five

• Four

• Three

• Two

What should you do if the next digit after the significant figures is 5 or more?

• Leave the number as it is.

• Subtract one from the last significant figure.

• Add one to the last significant figure.

• Ignore the next digit.

What is the final rounded number of 0.0040752 to three significant figures?

• 0.00408

• 0.00405

• 0.00406

• 0.00407